PF-MIX-SET is a core function of Proffuse, a modular software package for programming real time digital audio systems. It is designed for mixing multiple audio streams in real time, with support for audio formats from mono to 5.1 surround sound and various sample rates. It provides advanced mixing tools that enable mixing of source frequencies, channels, and audio formats. An integrated limiter provides protection from clipping and peak levels, and a multiband EQ provides total frequency control. It also offers a flexible automation system for recallable parameter settings, full routing and external control options, and supports both PC and Mac operating systems.